Fakultät für Physik
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TA1: Theoretical Solid State Physics – Material/Schedule

Lecture 1, Thurs. Oct. 17.: 1) Introduction: Adiabatic approximation, Ideal lattices, Bravais lattice, Primitive cell, Wigner Seitz cell, Lattices with Basis (AM, Ch. 4)
Lecture 2, Fri. Oct. 18.: Reciprocal lattice, Lattice planes, X-ray diffraction, Bragg & Laue condition (AM, Chap. 5,6), Space & Point group (AM, Chap. 7),
Lecture 3, Tue. Oct. 22: 2) Free electron description: Drude theory of metals, Thermodynamics of the free electron gas (AM. Chap. 1),
Lecture 4, Thurs. Oct. 24: Sommerfeld expansion (AM, Chap 2); 3) Electrons in periodic potentials, Bloch theorem (AM, Chaps. 8,9)
Lecture 5, Tue. Oct. 29: Bloch theorem: Derivation, Born-von Karman boundary conditions
Lecture 6, Tue. Nov. 5: Density of states, Fermi surface, Electrons in weak periodic potentials, band structure (AM, Chaps. 8,9)
Lecture 7, Thurs. Nov. 7: Weak potentials cont'd, Fermi surfaces, Wannier functions, tight-binding method (AM, Chaps. 9,10)
Lecture 8, Tues. Nov. 12: 4) Semiclassical theory of electron dynamics (AM 12)
Lecture 9, Thurs. Nov. 14: Bloch oscillations, motion in magnetic fields, cyclotron frequency, de Hass van-Alphen effect, Relaxation-time approximation (AM 13)
Lecture 10, Tue. Nov. 19: Electrical conductivity, thermal conductivity
Lecture 11, Thurs. Nov. 21: Thermal conductivity, Thermoelectric effects, Boltzmann equation (AM 16)
Lecture 12, Tue. Nov. 26: 5) Interactions, Many-body effects: Many-body wave functions, Hartree-Fock approximation
Lecture 13, Thurs. Nov. 28: Jellium model, Screening (Thomas-Fermi approximation)
Lecture 14, Tues. Dec. 3: Hohenberg-Kohn-Sham theorem, 2nd quantization
Lecture 15, Thurs. Dec. 5: 2nd quantization: examples,
Lecture 16, Tues. Dec. 10: Dielectric response, Lindhard function
Lecture 17, Thurs. Dec. 12: Dielectric response, Collective oscillations, Thomas-Fermi limit, Friedel-oscillations, 6) Fermi-liquid theory
Lecture 18, Tues., Dec. 17: Fermi liquid theory: Quasi-particle life-time
Lecture 19, Fri, Dec. 20: Fermi liquid theory ctd, 7) Lattice dynamics: AM Chaps. 22,23,26
Lecture 20, Tue, Jan. 7 Discussion midterm exam, Classical theory of lattice dynamics
Lecture 21, Thurs. Jan 9 Dynamical matrix, Quantum theory of phonons, thermodynamics
Lect. 22, Tue. Jan. 14 Elastic medium: quantization, Kohn anomaly, Peierls instability in 1D
Lect. 23, Thurs. Jan. 16

Peierls instability cont'd.
8) Magnetism: Dia- and paramagnetism (AM 31)

Lect. 24, Fri. Jan. 17 Magnetic correlations (AM 32)
Lect. 25, Thurs. Jan. 23 Magnetic correlations (AM 32): direct and kinetic exchange
Lect. 26, Tue. Jan. 28 Magnetic ordering, molecular-field theory, Mott transition, Heisenberg model
Lect. 27., Thurs, 01/30 Spin waves, thermodynamics of FM Heisenberg, Stoner instability
Lect. 28, Tue 02/04 Heisenberg AFM,  9) Superconductivity: Phenomenology
Lect. 29, Thurs. 02/06 BCS theory

Verantwortlich für den Inhalt: F. Heidrich-Meisner